Attachment for lathes.



atanted July E6, B901.

6. HARZMEIER- & L. BISEH- ATMOHIENT FUR LATHES.

(Application filed mm. 22, 1901.)

(No Model.)

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CHARLES IIARZMEIER, OF ST. LOUIS, AND LOUIS BISOII, OF JEFFERSON BARRAOKS, MISSOURI.

ATTACHMENT FOR LATHES.

SZPEOIFICATION forming part of Letters Patent No. 678,662, dated July 16, 1901.. Application filed March 22, 1901. Serial No. 62,459. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES HARZMEIER, of the city of St. Louis, and LoUIs BISCH, of Jefferson Barracks, Missouri, have invented certain new and useful Improvements in Attachments for Lathes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to attachments for lathes; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

The object of this invention is to provide a device to be used in combination with lathes whereby any object supported thereby can be divided into any number of equal divisions.

Our invention consists of dividing the usual cone-pulley into a number of circles, and each circle is divided into a number of uniform divisions, the divisions being of different ex: tent, ranging from one-half of the circumference of the pulley to the largest number of parts into which it would be desired to divide any object. Openings are formed at the divisional points on each circle, and an indexarm having a point is supported adjacent to the pulley, and the point is designed to engage within the openings to hold the pulley, and thereby the object, in the required position to permit the division. The index-arm is adjustable and may be moved from the smallest to the largest pulley and when not in use may be moved aside to be out of the way of the belt which is applied to the pulley.

In the drawings, Figure 1 is a view show- Fig. 2 is an end view and shows the clamp by which the indexarm issupported.

As shown in Fig. 1, the diiferent pulleys forming the cone-pul1ey are divided into a number of circles, and in the form shown these circles are subdivided into divisions ranging from six to thirty-two. It is manifest, however, that the number may be in creased, if found desirable, and such changes would be mere matters of degree and would not involve any new principle over our inven tion. The first circle on the small pulley at the left is divided into six equal parts, separated by openings, (indicated in the drawings by the numeral 6.) On the shaft of the conepulley in the form shown are two brackets 1, which carry on their outer ends the pointed screws 2. A rod or shaft 3 is supported by the screws 2, and on the said rod 3 the indexarm is carried. A clamp 4t engages over the rod or shaft 3 and is held in position thereon by means of the set-screw 4:. The index-arm 5 is supported by the clamp 4 by means of a set-screw 5, which extends through a slot 5", formed near the end of the index-arm. The said slot permits the index-arm to be adjusted to any position, and by tightening the screw 5 it may be retained in such position as long as desired. On the inner end of the arm 5 is a point 5, adapted to engage in the openings formed in the pulleys and to hold them and the objects carried thereby stationary while the said object is being divided into any number of parts or otherwise operated upon.

As above stated, the circle at the extreme left is divided into six equal divisions by the openings 6, and by alternately engaging the point 5 in these openings the object may be divided into six equal parts. In case it is desired to divide the objects into any number of parts of which six is the multiple it may be so done by omitting or skipping a number of the openings 6 and engaging the point 5 only in the number required to divide the object into a smaller number of parts--that is to say, for example, if it is desired to divide the object into three equal parts this may be done by engaging the point 5 in each alternate opening 6 and omitting the other openings, or in case it is desired to divide the objectinto two equal parts by engaging the point 5 within diametrically opposite openings. Hence it is seen that the divisional openings 6 permit of the object being divided into two, three, or six equal parts, as the case may be. The next circle is divided into eight equal parts by the openings 8 and permit the object being divided into two, four, or eight equal parts. The next circle, as shown, is divided by the openings 10 into ten equal parts and permit of the object being divided into two, five, or ten equal parts, while the next circle isdividedinto fourteen equal partsand permit of the object being divided into two,seven, or fourteen equal parts. The next circle of ICC the pulley is divided into seventeen equal parts by the openings 17, and from the number seventeen the dilferent pulleys are divided successively into different parts, ranging from eighteen to thirty-two. The number may be increased, if desired, by locating the circles nearer each other to permit a greater number to be formed on the pulleys. In this scale of numbers are multiples of all the other numbers not specially provided for on the pulleysas, for example, eighteen is a multiple of nine and permits of the object bein g divided into nine equal parts; twenty-two, eleven; twenty-six, thirteen, and so on, all numbers being accounted for which are not provided with special circles on the pulleys.

The arrangement of course would be slightly diiferent in case the scale is extended, and certain numbers which are shown would then be omitted, and the drawings are only intended to illustrate the essential features of the invention, and we do not desire to be limited to the exact form shown.

We have shown and described an index-arm as being supported by a special rod or shaft provided for that purpose; but in the case of an iron lathe the index-finger would be supported to the gear-shaft which takes the place of the shaft 3. The principle in either case is the same and requires only a readjustment of the parts to apply the invention in either instance.

While the object is being divided'as described the belt is of course removed from the pulleys to permit the latter to remain stationary and to he turned by hand or otherwise to adjust the index-arm in different positions.

We claim 1. In combination with the cone-pulley of a lathe, two arms carried by the shaft thereof,

a shaft 3 supported by said arms, and an adjustable index-arm 5 carried by said shaft 3 and having a point 5, the surface of the conepulley having a series of suitably-spaced openings within which the said point 5 is adapted to engage, substantially as specified.

2. In a lathe, a cone-pulley provided with a number of suitably-spaced openings, the combination therewith of two arms carried by the shaft of the cone-pulley, a shaft 3 carried by said arms, a clamp 4 mounted on said shaft, an adjustable index-arm 5 connected to said clamp and a point 5 rigid with the outer end of said index-arm and adapted to engage in the openings in the cone-pulley.

In testimony whereof we affix our signatures in presence of two witnesses.

CHARLES I-IARZMEIER. LOUIS BISOH.

Witnesses:

JOHN D. RIPPEY, ALFRED A. E1oKs. 

